Stress from a traumatic event can often lead to a variety of sleep problems. When the body is overstimulated, the brain is flooded with neurochemicals that keep us awake, such as epinephrine and adrenaline, making it difficult to wind down at the end of the day. The neurochemicals remain present in the brain and can interrupt your normal sleep cycle. The result can be insomnia, bad dreams, and daytime fatigue caused by sleep disturbance.